We did the Advanced Search several times and were unable to find any errors in the php error logs or Apache error logs.

I believe the issue is that the 1.10 version does not place any collaborator information in the ost_thread_entry table.

I was unable to attach the file that had images for the information below.

In the 1.9 versions it appears that theCollaborator information was added as an internal note. This information wassearchable.In the 1.10 version it appears that theCollaborator information is not added as an internal note. This information isnot searchable.

We upgraded our Development system to version 1.10.1. Added a collaborator to an existing ticket. Advanced Search did not find the added collaborator as there was no entry into the table ost_thread_entry.

Also tested creating a new ticket and adding 2 collaborators. Advanced Search did not find either collaborator.

Back in the v1.9.x series, pretty much all ticket events (including Adding Collaborators) were saved as Internal Notes, as you mentioned above. Internal Note contents were searchable, therefore you could successfully search for the Collaborator's name. In the v1.10.x series, we started saving all ticket events to the `ost_thread_event` table. The values in this table are not searchable, therefore you cannot search for Collaborators.